High-integrity forged carbon steel, austenitic stainless steel, and alloy flanges machined to ASME B16.5, EN 10204 3.1, and pressure equipment directives.
Serbia's heavy industry, energy sector, and urban utility modernization are experiencing structural capital investment. From the intensive refinery upgrades at NIS Gazprom Neft in Pančevo to district heating revitalizations in Belgrade and metallurgical expansions in Smederevo and Bor, certified industrial flanges form the critical backbone of fluid containment.
While European mechanical engineering frequently specifies EN 1092-1 metric standards (PN 10 to PN 40), international EPC contractors operating across the Balkans heavily leverage ASME B16.5 Class 150 pressure boundaries. Class 150 operates as the universal standard for low-to-medium pressure utility headers, cooling lines, hydrocarbon processing, district steam, and chemical dosing manifolds.
We provide full technical dossier submissions including EN 10204 3.1 chemical analysis, Charpy V-Notch impact testing down to -46°C for low-temperature carbon steels (ASTM A350 LF2), and intergranular corrosion tests (ASTM A262 Practice E) for 300-series stainless alloys.
Engineered to resolve specific environmental, chemical, and regulatory challenges across Serbian regional installations.
In refining and intermediate chemical production, Class 150 Weld Neck (WN) and Slip-On (SO) flanges in ASTM A105 and ASTM A182 F316L are vital for process cooling, hydrocarbons, and amine treatment loops. Delivered with serrated concentric or spiral serrated Raised Face (RF) 125-250 AARH finish to ensure bubble-tight sealing with spiral wound graphite gaskets.
District heating systems requiring seasonal operational cycling utilize P235GH and ASTM A105 Class 150 Flat Face (FF) and Raised Face flanges. Our normalizing heat treatments eliminate residual forging stress, preventing micro-fracture propagation caused by water hammer and cyclic thermal expansion in municipal thermal grids.
Copper extraction and mineral processing plants require severe corrosion and abrasion resistance. We provide dual-rated 316/316L, Duplex 2205, and heavy-duty hot-dip galvanized Class 150 flanges engineered to withstand acidic slurry pipelines, sulfur dioxide tail-gas treatment units, and industrial effluent transport.
Comparative design engineering parameters according to ASME B16.5 and European harmonized standard equivalents.
| Nominal Pipe Size (NPS) | Outside Diameter (OD) | Bolt Circle (PCD) | Number of Bolts | Bolt Hole Diameter | Max Working Pressure (A105 at -29°C to 38°C) |
|---|---|---|---|---|---|
| 1/2" (DN15) | 89 mm (3.50 in) | 60.5 mm (2.38 in) | 4 | 15.7 mm (0.62 in) | 19.6 bar (285 psi) |
| 1" (DN25) | 108 mm (4.25 in) | 79.2 mm (3.12 in) | 4 | 15.7 mm (0.62 in) | 19.6 bar (285 psi) |
| 2" (DN50) | 152 mm (6.00 in) | 120.7 mm (4.75 in) | 4 | 19.0 mm (0.75 in) | 19.6 bar (285 psi) |
| 3" (DN80) | 190 mm (7.50 in) | 152.4 mm (6.00 in) | 4 | 19.0 mm (0.75 in) | 19.6 bar (285 psi) |
| 4" (DN100) | 229 mm (9.00 in) | 190.5 mm (7.50 in) | 8 | 19.0 mm (0.75 in) | 19.6 bar (285 psi) |
| 6" (DN150) | 279 mm (11.00 in) | 241.3 mm (9.50 in) | 8 | 22.4 mm (0.88 in) | 19.6 bar (285 psi) |
| 8" (DN200) | 343 mm (13.50 in) | 298.5 mm (11.75 in) | 8 | 22.4 mm (0.88 in) | 19.6 bar (285 psi) |
| 12" (DN300) | 483 mm (19.00 in) | 431.8 mm (17.00 in) | 12 | 25.4 mm (1.00 in) | 19.6 bar (285 psi) |
Piping supply chains in Southeastern Europe are transitioning through three clear operational shifts:
1. Strict Traceability & Anti-Dumping Compliance: Serbian procurement specialists are demanding raw steel material verification originating exclusively from accredited prime mills across India, Japan, or South Korea. In-house mechanical testing, spectrometer PMI reports, and clear steel heat numbers stamped onto every flange skirt minimize counterfeit exposure.
2. Consolidation of Flanges, Fittings & Bolting Packages: Serbian EPC mechanical contractors prefer bundled bill-of-materials sourcing. By manufacturing ASME B16.5 Class 150 flanges alongside ASME B16.9 buttweld elbows, forged branch outlets (ASME B16.11), and high-tensile ASTM A193 Grade B7/ASTM A194 Grade 2H stud bolting packages, we eliminate assembly tolerance mismatches on the jobsite.
3. Transition Toward Corrosion-Resistant Alloys (CRA): With tightening sulfur recovery requirements and deep-well geothermal heating projects around Vojvodina, demand is accelerating away from standard carbon steel toward 316L, 904L, and 2205 Duplex Class 150 flanges.
Operating continuously since 1991 as an internationally accredited export house approved by EIL, IBR, and leading EPCs.
Operating under ISO 9001 certified quality management systems, our forgings hold comprehensive approvals from Engineers India Limited (EIL), Indian Boiler Regulations (IBR), and direct qualification for major petrochemical consortia worldwide.
Our plant houses 11 specialized quality testing machines, including direct-reading optical emission spectrometers, universal tensile testing rigs, Charpy impact test benches, automated Brinell hardness testing, and ultrasonic thickness scanners.
Experienced in containerized and breakbulk logistics into Port of Bar (Montenegro), Port of Rijeka (Croatia), and Port of Thessaloniki (Greece) with dedicated customs transit documentation into Belgrade, Novi Sad, and Niš industrial zones.
Direct technical answers addressing standards compliance, metallurgy, and logistics for mechanical engineers and buyers.
Speak directly with our technical sales engineers for immediate material take-off (MTO) quotations, EN 10204 3.1 mill cert evaluations, and comprehensive flange, fitting, and bolting package estimates.
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